Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heights
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | LOCUS Repositório Institucional da UFV |
Texto Completo: | http://dx.doi.org/10.1590/S1516-35982010001000006 http://www.locus.ufv.br/handle/123456789/15280 |
Resumo: | This work was performed aiming to evaluate the morphogenetic and structural characteristics of Andropogon gayanus cv. Planaltina species submitted to three cutting heights (20, 27 and 34 cm). The three cutting heights were allocated in experimental units (12 m2) in a complete randomized block design with three replications. The cuts were done when the light interception by the sward reached 95%. At this moment, the sward height revealed itself constant with values close to 50 cm. The lowest cutting height (20 cm) influenced negatively the final leaf blade length, the number of live leaves, the leaf lifespan, the stem elongation rate and the tiller population density, and it influenced positively the phyllochron and the leaf senescence rate. Probably, cuts at 20 cm height caused a high decapitation and death of the tillers. The worst growth conditions in addition to the blossom of this specie occurred during fall resulted in higher stem elongation rates and number of live leaves, and lower phyllochron, final leaf blade length, and leaf lifespan. The sward height can be used as a practical and efficient criterion in the management of andropogon grass. Under intermittent management conditions, the regrowth of andropogon grass must be interrupted when the sward reaches 50 cm height, and the defoliation must be interrupted when the stubble height is close to 27 cm. |
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Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heightsAndropogon gayanusEcophysiologyLight interceptionMorphogenesisSward heightThis work was performed aiming to evaluate the morphogenetic and structural characteristics of Andropogon gayanus cv. Planaltina species submitted to three cutting heights (20, 27 and 34 cm). The three cutting heights were allocated in experimental units (12 m2) in a complete randomized block design with three replications. The cuts were done when the light interception by the sward reached 95%. At this moment, the sward height revealed itself constant with values close to 50 cm. The lowest cutting height (20 cm) influenced negatively the final leaf blade length, the number of live leaves, the leaf lifespan, the stem elongation rate and the tiller population density, and it influenced positively the phyllochron and the leaf senescence rate. Probably, cuts at 20 cm height caused a high decapitation and death of the tillers. The worst growth conditions in addition to the blossom of this specie occurred during fall resulted in higher stem elongation rates and number of live leaves, and lower phyllochron, final leaf blade length, and leaf lifespan. The sward height can be used as a practical and efficient criterion in the management of andropogon grass. Under intermittent management conditions, the regrowth of andropogon grass must be interrupted when the sward reaches 50 cm height, and the defoliation must be interrupted when the stubble height is close to 27 cm.Este trabalho foi realizado com o objetivo de avaliar as características morfogênicas e estruturais da espécie Andropogon gayanus cv. Planaltina, submetida a três alturas de corte (20, 27 e 34 cm). As três alturas de corte foram alocadas às unidades experimentais (12 m2) em delineamento de blocos completos casualizados com três repetições. Os cortes foram realizados quando a interceptação luminosa pelo dossel atingiu 95%. A altura do dossel nesse momento mostrou-se constante, com valores próximos a 50 cm. A menor altura de corte (20 cm) influenciou negativamente o comprimento final da lâmina foliar, o número de folhas vivas, a duração de vida da folha, a taxa de alongamento de colmo e a densidade populacional de perfilhos, e positivamente o filocrono e a taxa de senescência de folhas. Provavelmente, cortes a 20 cm de altura causaram elevada decapitação e morte de perfilhos. As piores condições de crescimento junto do florescimento ocorrido durante o outono resultaram em maiores taxas de alongamento de colmos e número de folhas vivas e em menor filocrono, comprimento final da lâmina foliar e duração de vida da folha. A altura do dossel pode ser utilizada como critério prático e eficiente de manejo do capim-andropógon. Em condições de manejo intermitente, a rebrotação deve ser interrompida quando o dossel atingir 50 cm de altura, e a desfolhação, quando a altura de resíduo ficar próxima de 27 cm.Revista Brasileira de Zootecnia2017-12-15T14:18:50Z2017-12-15T14:18:50Z2009-12-30info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlepdfapplication/pdf1806-9290http://dx.doi.org/10.1590/S1516-35982010001000006http://www.locus.ufv.br/handle/123456789/15280engv. 39, n. 10, p. 2141-2147, Oct. 2010Sousa, Braulio Maia de LanaNascimento Júnior, Domicio doSilva, Sila Carneiro daMonteiro, Hélida Christhine de FreitasRodrigues, Carlindo SantosFonseca, Dilermando Miranda daSilveira, Márcia Cristina Teixeira daSbrissia, André Fischerinfo:eu-repo/semantics/openAccessreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFV2024-07-12T08:35:29Zoai:locus.ufv.br:123456789/15280Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452024-07-12T08:35:29LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false |
dc.title.none.fl_str_mv |
Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heights |
title |
Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heights |
spellingShingle |
Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heights Sousa, Braulio Maia de Lana Andropogon gayanus Ecophysiology Light interception Morphogenesis Sward height |
title_short |
Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heights |
title_full |
Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heights |
title_fullStr |
Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heights |
title_full_unstemmed |
Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heights |
title_sort |
Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heights |
author |
Sousa, Braulio Maia de Lana |
author_facet |
Sousa, Braulio Maia de Lana Nascimento Júnior, Domicio do Silva, Sila Carneiro da Monteiro, Hélida Christhine de Freitas Rodrigues, Carlindo Santos Fonseca, Dilermando Miranda da Silveira, Márcia Cristina Teixeira da Sbrissia, André Fischer |
author_role |
author |
author2 |
Nascimento Júnior, Domicio do Silva, Sila Carneiro da Monteiro, Hélida Christhine de Freitas Rodrigues, Carlindo Santos Fonseca, Dilermando Miranda da Silveira, Márcia Cristina Teixeira da Sbrissia, André Fischer |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Sousa, Braulio Maia de Lana Nascimento Júnior, Domicio do Silva, Sila Carneiro da Monteiro, Hélida Christhine de Freitas Rodrigues, Carlindo Santos Fonseca, Dilermando Miranda da Silveira, Márcia Cristina Teixeira da Sbrissia, André Fischer |
dc.subject.por.fl_str_mv |
Andropogon gayanus Ecophysiology Light interception Morphogenesis Sward height |
topic |
Andropogon gayanus Ecophysiology Light interception Morphogenesis Sward height |
description |
This work was performed aiming to evaluate the morphogenetic and structural characteristics of Andropogon gayanus cv. Planaltina species submitted to three cutting heights (20, 27 and 34 cm). The three cutting heights were allocated in experimental units (12 m2) in a complete randomized block design with three replications. The cuts were done when the light interception by the sward reached 95%. At this moment, the sward height revealed itself constant with values close to 50 cm. The lowest cutting height (20 cm) influenced negatively the final leaf blade length, the number of live leaves, the leaf lifespan, the stem elongation rate and the tiller population density, and it influenced positively the phyllochron and the leaf senescence rate. Probably, cuts at 20 cm height caused a high decapitation and death of the tillers. The worst growth conditions in addition to the blossom of this specie occurred during fall resulted in higher stem elongation rates and number of live leaves, and lower phyllochron, final leaf blade length, and leaf lifespan. The sward height can be used as a practical and efficient criterion in the management of andropogon grass. Under intermittent management conditions, the regrowth of andropogon grass must be interrupted when the sward reaches 50 cm height, and the defoliation must be interrupted when the stubble height is close to 27 cm. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-12-30 2017-12-15T14:18:50Z 2017-12-15T14:18:50Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
1806-9290 http://dx.doi.org/10.1590/S1516-35982010001000006 http://www.locus.ufv.br/handle/123456789/15280 |
identifier_str_mv |
1806-9290 |
url |
http://dx.doi.org/10.1590/S1516-35982010001000006 http://www.locus.ufv.br/handle/123456789/15280 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
v. 39, n. 10, p. 2141-2147, Oct. 2010 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
pdf application/pdf |
dc.publisher.none.fl_str_mv |
Revista Brasileira de Zootecnia |
publisher.none.fl_str_mv |
Revista Brasileira de Zootecnia |
dc.source.none.fl_str_mv |
reponame:LOCUS Repositório Institucional da UFV instname:Universidade Federal de Viçosa (UFV) instacron:UFV |
instname_str |
Universidade Federal de Viçosa (UFV) |
instacron_str |
UFV |
institution |
UFV |
reponame_str |
LOCUS Repositório Institucional da UFV |
collection |
LOCUS Repositório Institucional da UFV |
repository.name.fl_str_mv |
LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV) |
repository.mail.fl_str_mv |
fabiojreis@ufv.br |
_version_ |
1817560027332870144 |